Consider steady-state, one-dimensional heat conduction through the shape shown in the figure. Cross-sectional area is variable (Ax(x)=Aoeax). The lateral surface of the rod is well-insulated. Left and right surface of the rod are maintained at constant temperature of T1 and T2, respectively. Assuming that thermal conductivity is constant, express an equation to determine the heat transfer rate through the wall.

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.